Backus–Naur Form, sometimes expanded as Backus Normal Form, is a notation for describing the syntax of computer languages.

See Also  edit

BNF for Tcl

RFC 5234, Augmented BNF for Syntax Specifications

Generating Syntax Diagrams Using Tk

BNF(-like) parsers for Tcl  edit

yeti

a yacc-like parser generator for itcl

byacc

at http://www.bodenstab.org/

ebnf

in http://chiselapp.com/user/aspect/repository/tcl-hacks/

Description  edit

Technically, BNFs are capable of describing context-free languages, which is often not quite powerful enough to describe actual computer languages, but they're so intuitive that people use them anyway, and bolt on what's missing as special cases and extra constraints.

For an example, see http://bernhard.userweb.mwn.de/Algol-BNF.html

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